# encoding:utf-8

import  re
import urlparse
from bs4 import BeautifulSoup

class HtmlParser(object):

    def parse(self, page_url, html_cont):
        if page_url is None or html_cont is None:
            return

        soup = BeautifulSoup(html_cont, 'html.parser', from_encoding='utf-8')
        new_urls = self._get_new_urls(page_url, soup)
        new_data = self._get_new_data(page_url, soup)

        return new_urls, new_data


    def _get_new_urls(self, page_url, soup):

        new_urls = set()
        # links = soup.find_all('a', href=re.compile(r'/view/\d+\.html'))
        # links = soup.find_all('a', href=re.compile(r'/item/[\%\w]+(?!\.txt)$'))
        links = soup.find_all('a', href=re.compile(r'/item/[\%\w]+'))
        # print links
        for link in links:
            new_url = 'http://baike.baidu.com' +link['href']
            new_full_url = urlparse.urljoin(page_url, new_url)
            new_urls.add(new_full_url)

        return new_urls

    def _get_new_data(self, page_url, soup):
        data = {}
        data['url'] = page_url
        title = soup.find('dd', class_='lemmaWgt-lemmaTitle-title').find('h1')
        data['title'] = title.get_text()
        summary = soup.find('div', class_='lemma-summary')
        data['summary'] = summary.get_text()

        return data



